Round 1: So the X-Men line-up from WATXM (Wolverine, Cyclops, Kitty Pryde, Iceman, Beast, Emma Frost) have gone to Genosha looking for Professor X, as they did early in the show. As the team is searching through the hall of Magneto's fortress, they run encounter a brutish grayish-blue armored figure.
"Apologies, meat. But no one is going anywhere"
Black Beetle uses his armor to lock all the doors, forcing the X-Men to face Black Beetle. The doors will not open until he is defeated.
Round 2: The entire WATXM X-Men (Wolverine, Cyclops, Kitty, Iceman, Emma, Storm, Beast, and Nightcrawler) against Black Beetle in the underwater greenhouse from the Mojo episode of WATXM.