It’s the mid-2000’s revival that nobody asked for! But hot damn was it amazing. It’s Squirrel Girl! And she joined the Great Lakes Avengers in a little miniseries called GLA: Misassembled.
But then they became the GLX (because X-Men, duh) and so then there was a GLX-Mas one-shot special and we just went ahead and read the whole damn thing.
There’s a death in every single issue, surely that will put you in the holiday spirit!