I've heard from reliable sources that Carrey's Austin will suffer a horrible voice box injury in the crash, and they will decide to reinstall his speech center in his rectum, so Carrey can do his ever popular "bent over talking ass" routine in the movie! Boy, I never get tired of that.
Truthfully, if they remade this as a serious drama, it would never hold up to the original series. There were so many things that made the original special (slow motion running, the "de de de de de" sound effect for vision, the jumping over buildings obvious backward wound footage) that would now be done with CGI, and would lose their charm. Who really wants to see this, when it's already been done in Robocop, Terminator, etc. So, I'm glad their going to do a comedy spoof/parody. Let the original stand, and let's have some fun with it, just like Charlie's Angels.