The Worms games are fun, but they've about reached the limit of what they can do with them. This is the second handheld version (the first one came out only a year ago). Could be a fun portable game. IGN seems to be the only ones who rated it, and they gave it an 87%.
I'm looking forward to it. I've got it on order but bundled it with Soul Calibur III to save on shipping. I don't think they brought back the whole cast -- I'm pretty sure that the guy who played Rembrandt died some time ago.