My Two Cents, likely beating the life out of the topic, but I think that the Gen III remakes/reboots/whatever they are could either mean a playable Gen III character or DLC being a Gen III. Leaning towards the latter as it's a case similar to Snake; It would be good advertisement for Game Freak's new game, as Pokemon characters are dictated by different means, but it could just be too late in development to implement a Gen III. Then again, Sakurai knows this stuff far in advance...
So would I assume a Gen III is a shoo-in? No. But, I think it's plausible that a Gen III character could definitely be a DLC character if Newcomers are concerned.
As for who that could be, many say Blaziken or Sceptile. Granted, either can happen, but I lean towards Sceptile as Type Reptition wouldn't be the best sort of way to show off the unique typing of Pokemon as a concept. Pichu broke the rule because it was literally the biggest Gen II Poke at the time. Blaziken could also be too similar to Falcon and less unique in that regard, but much easier to implement.