Yeah, IM2 was a let down. Oddly enough, I enjoyed it in the theaters, but after about a week I could barely recall any great moments from the movie. In fact, it seemed that all the good parts were references to other Marvel movies that weren't even out yet. Here's hoping IM3 stays in the Iron Man universe and deals exclusively with Iron Man characters. Isn't there some evil Chinese dude with ten magical rings? They've been hinting at him almost as much as the Lizard in the Spider-Man movies. Just use the damn villain and stop hinting!
Not really looking forward to the Spider-Man and Superman reboots. To have two super hero series getting a reboot within less than 5 years of the last movie is just plain stupid. Raimi totally could have redeemed himself with SM4 (the third one actually was a huge financial success) by bringing in Kraven the Hunter and having him tracking down Dr. Connors aka the Lizard. Right there you have a great way to introduce two villians and have Spider-Man getting between them.
As for Superman, I'll admit that Superman Returns wasn't the greatest superhero movie, but it was really well orchestrated and shot. It also had a number of epic moments. Again, the director could have easily made a great sequel. In fact, plans were to drop the "Superman is a father" plot (or at least put it in the background) and have an all out Superman vs. Brainiac movie. But I'm certain the reboot will simply bring back Luthor and Zod once again.