Top 7 comics cameos I'd like to see in a movie

With the cameos that they've placed in the Iron Man and Incredible hulk, I started thinking about other cameos I'd like to see in future comic book movies.

1. Spider-man - I don't want to see Tobey Macguire getting screen time on the set of avengers (unless he's one of them of course), but any Marvel superhero movie set in New York could have Spidey just swing by in the background. Don't even have the camera focus on him, just something like you'd see out of the corner of your eye. The Marvel Universe is supposed to be all connected. (As an aside, if you haven't seen it yet check this out)
2. Superman - Same thing as above but for a DC movie. Just a blue/red streak flying overhead. Probably not in the Batman movies they're currently making, but if they ever get around to a Wonder Woman or Flash movie it would be awesome.
3. Punisher in a Spider-man Movie. Now they could probably make a great movie based on the concept - after all Punisher's first appearance was in a Spider-man comic book, but even just a cameo of a Punisher watching spidey swing away would add points to the movie in my mind.
4. Legion of Superheroes on Smallville. maybe not really a cameo (and not really a movie either), but it would be a great plot device.
5. Shocker - actually any lesser known villain, but if any of you have read Ultimate spider-man you know what I'm talking about. A movie generally has to concentrate on just one or two villians, otherwise you get camp like "Batman and Robin". It could be cool to have some more obscure or wimpy villian get owned in just a few seconds. This could be in any comic book movie sequel.
6. The Leader - I know, he was already in the latest hulk movie, but I'm hoping that he doesn't have a big part in the next movie. Just a shadowy figure thay we find out is observing and manipulating events that won't come to a head until a future sequel. Foreshadowing can be a good thing.
7. A skrull - in a Marvel movie it could start all kinds of hype and speculation if there were someone - just an extra maybe - who just flashed that familiar green face and chin for just a second.

So there you have it, my top 7 cameos. Who did I miss? is there anything that you would change?