Answer my question dammit!
Your question will be answered when the final participant has joined, along with the other rules and restrictions for the tournament.
I actually think both Mister Fantastic and Spider man 2099 should be excluded. Mr Fantastic because when used properly, he can subdue nearly anyone. Spiderman 2099 because he can do everything spiderman can do, only with a dozen enhancements beyond that.
Mister Fantastic is far below Spider-Man in terms of power, and is not one of the 'extremes' like Quicksilver would be. It's quite possible to defeat him if you have a little imagination.
As for Spider-Man 2099, he has the same general power level as Spider-Man. And while, yes, he does have a few things that Spider-Man doesn't, the same goes the other way around. Spider-Man 2099 doesn't have a danger-sense.
If Mister Fantastic were to be excluded, it would be because of Skills. And if Richards was removed because of that, there would be several other characters that would need to be removed as well.
Character acceptance or removal, is based on Powers, not skills.