Since there are only two episodes left for OK KO ,I think I am going to give my theory on what the Last two episodes are about,
The first one which will likely be a half hour special because remember the last scene at the end of "Dendy's Video Channel"?:
Well I think it hints that the episode involves a fighting tournament story as a homage/parody to Shonen manga tournament arc cliches that started with dragonball as it involves a tournament between Lakewood plaza and Boxmore who is now under the leadership of Shadowy Venomous a fusion of Professor venomous and his shadowy figure personality (similar to PKO) as the tournament involves a battle on who wins and owns the losers company along with the world and it is also hosted by Dynamite Watkins since she is a celebrity reporter and likes to spice things up with her commentary.
The rest of the tournament episode has the people of Lakewood plaza battle against Shadowy Venomous and TKO since they are the only ones in Boxmore and are powerful that they easily beat them out including the boxmore's robots ,Meanwhile KO's allies who are benchwarmers are worried as they need to find a way to bring KO back despite that he is still trapped in the subconscious mind while Fink (Venomous's minion and likely adopted daughter) was okay with Shadowy Venomous but wants the old Professor Venomous back as he is like a father figure to her and less evil.
In the next scene as TKO keeps fighting against his 'former' allies Enid and Rad in a tournament round,KO who is still trapped in his subconsciousness still feels weak and fully emotion like what happens in the episode 'Carl' and that he can't defeat his darker personality TKO from within especially when he feels helpless while watching his friends Enid and Rad get beaten up by TKO but then when he remembered all the heroes he encountered especially the life lessons he learned from his experience throughout the series including his pow cards, KO regains his confidence , frees himself from the subconscious and has a final showdown with TKO which is now a battle between mind,body and soul ,Then KO defeats TKO using a parody of Kamehameha that is empowered by the good memories he spent time with his family and friends and vaporizes him from existence causing KO to regain control of his body back and apologies to his friends and family which they already forgive him this is when KO's pow card level up and gave him a final form which is parody of super saiyan (maybe I could call him 'pure form')
And then the final battle or in this case the second half of the episode begins when KO in his super form battles against Shadowy Venomous ,But instead of killing him like he did with TKO he instead only attack the other part of Shadowy venomous by using a super technique (a parody of the energrybending from nickelodeons avatar's series finale Sozin's comet) and takes out the shadowy figure personality within shadowy venomous reducing him to just Professor venomous ,At first Venomous was shocked that he is once again powerless like before but then understands the error of his ways on what he has done especially from his shadowy figure personality and ask to be forgiven by his son Ko and everyone which he and everyone already did,
Venomous also gets a hug from Fink who is happy to see the old venomous back and the end of the episode has the 'Status Quo Is God' moment when the tournament ends with a draw without a winner which no one owns each other especially when Venomous gave Boxmore company back to Boxman (after getting group therapy by Jethro's and gain inner peace as hinted from the end credits from "Dendy's Video Channel) while spending time with his likely adoptive daughter Fink and probably do marketing weapons to nefarious villains as usual. And with Boxman regaining control of his company,His robot children are once again coming back to boxmore and happy to be reunited with their 'dad' and the half hour special ends with the heroes happily carrying KO and haul him into the air as they are glad that he is back.
Then the next episode will be a regular episode and a usual 11 minute format but it is considered a series finale when it has a 'end of the series awareness' moment and a callback to the fourth wall breaking episode 'Your World is an Illusion ' which also reflects on cartoon network's decision to cancel the show due to low viewership .The episode starts out as a regular episode as usual but KO felt that something isn't right as every conflict and loose ends are resolved and that nothing exciting happens and things are changing especially that his mother Carol decides to marry Gar making him as his step dad then KO realize that the show and his world is about to end.
This made KO go through various Stages of Grief such as denial, anger and bargaining as he tries to prevent the show and his world from ending such as various tropes which are considered jumping the shark but to no avail .This cause Ko to receive another stage of Grief called depression (which on the bright side he didn't turn into TKO since he vaporized him from existence from the previous episode ) as he wasn't prepared for the show and the world to end but with the wisdom of the words from Holo-Jane from 'Your World is an Illusion' who comes back for the episode to cheer him up and a likely appearance of the cartoon version of his creator Ian Jones-Quartey,KO then receives the final stage of grief ,Acceptance as he accepts that his show and his world might end and will comeback through reruns and a reboot few years later except he won't remember everything that happened after the show ends but viewers will always remember him and his friends adventures throughout the series.
Then the series finale ends full circle for the series as Ko and his friends have a face to face showdown with Boxmore and his minions as this scene turns in to an opening sequence with poses and stuff and ends with a shot of KO
and the end credits for the series finale will have a special credits where every characters of the series in cutout forms outside wave goodbye to the viewers with a special song which will likely be melodious but heartwarming version of the end song
and thats my theory on the last two episodes of OK KO What do you think?