I don't like to think outside the box so I'd probably just predict the same stuff that everyone has already mentioned/spread rumors about before. Steve, Banjo, Isaac and Geno. I know you're joking with your list but Crash doesn't seem all that out there to me
Edit: Actually Steve is like the only one that makes much sense because why would you make DLC of a legacy character instead of something that is actually recent? Though I guess since Cloud was DLC anything is possible
Not joking, I'd bet money that I hit on at least one of the Capcom ones