Well Ant-Man is in the next Avengers, so you will get your wish there. There's also a possibility that there could be an Iron Man IV. i think RDJ mentioned a couple years back there was one in development, but that may have changed. I imagine he would get a HUGE paycheck to do another, which may preclude it from happening because I imagine Don Cheadle and Gweneth Paltrow would want similar pay raises. I personally didn't mind IM2 or 3, but I agree the first was the best and wouldn't mind a IV.