Frigga

It's such a shame that Frigga/Rene Russo is killed off in Thor 2! She plays that role so well! I would imagine that Stan Lee would make a third Thor movie and at least wrap it up into a trilogy. If so, it would be great for them to have kept Rene as Frigga.
On a side note, I hate it when actors play a character and are very good at playing that role, but are replaced by someone else. Like Terrence Howard as Rhodey in Iron Man 1. I like Don Cheadle, but Terrance was a much better and funnier Rhodey, IMHO. The exception would have to go to Mark Ruffalo as the Hulk. Mark Ruffalo is much more likeable and fitting actor for Hulk than Edward Norton was. Again, just MHO. But I'm sure actors have their personal, understandable reasons for walking away from a role. Their personal lives (health, family, retirement, etc.) or Hollywood reasons. Anyways.. sorry. Just wanted to comment on the sad loss of Rene Russo as Frigga from the Thor movies and got sidetracked. Cheers!