It feels wrong to post about voice acting for a LEGO game, but here goes anyway.
Legendary Marvel guru Stan Lee (former Marvel president and co-creator of Spider-Man, The Hulk, Iron Man and many others) will once again lend his voice to the proceedings, as he so frequently does with Marvel properties. Whether he'll play himself hasn't yet been confirmed, but knowing LEGO, there'll probably be an unlockable figure in there somewhere.
The entire cast feature numerous industry regulars, such as Laura Bailey, Dee Bradley Baker, Troy Baker, John Bentley, JB Blanc, Dave Boat, Steve Blum, Greg Cipes, Jeff Combs, John DiMaggio, Robin Atkin Downes, Clark Gregg, James Horan, Andrew Kishino, Phil LaMarr, Yuri Lowenthal, Danielle Nicolet, Nolan North, Adrian Pasdar, Roger Craig Smith, David Sobolov, Tara Strong, Fred Tatasciore, James Arnold Taylor, Kari Wahlgren, and Travis Willingham.
LEGO Marvel Super Heroes is out this Autumn on practically everything with a screen.