In order of likeliest to least likely:
Choose One: a Resistance Rep; Tomba; Oddworld Abe
Choose One: Old Snake; an Assassin's Creed Assassin; Crash Bandicoot; Sypro the Dragon
For me personally, from that list I would pick
2) Assassin's Creed rep, preferrably Connor but Ezio would be fine haha
but even though I am not a big Crash fan, I would sacrifice having any of those others just to have Crash in because this game would sell better and seen better in the eyes of the consumer just because of all the people wanting to buy and play it because of Crash nostalgia.