I want to wait 7 years. 7 is a good number.

I prefer TV shows with the MCU budgets. I think that would be better in the long run. Introduce small groups of characters or solo characters. Gradually build the MCU era mythology. I really would advise to hold off on introducing "everybody" in a movie and trying to shoehorn in 10 new characters in each movie. We've seen the mixed results with certain films. I personally didn't hate certain films but I did see where they could be better.

I don't see the 05 as being guaranteed to be involved right away. Probably Cyclops and Jean to uplift the (cliche) of the X-Men's favorite couple. The other three, not so much.