Looking at IMDB, I hope they eventually fill in the cast to address some of those characters in the void I wasn't sure about.
Lady Deathstrike isn't on IMDB yet, and I think that was her in the Void even though they never closed in on her. Who knows how many of the others were randos or were supposed to be specific characters. They kind of went video game mode with the npc bad guys just coming and coming to be shredded.
IMDB did reveal why Cowboy Deadpool sounded familiar. Alright alright alright.
Remains to be seen if the plot has much bearing on the future, but my understanding at the end is that Deadpool and this version of Wolverine are essentially staying in the universe that Deadpool started in. BUT...we now know that Happy Hogan and the Avengers existed in his universe too, sooo - do they need to cross over into the Sacred Timeline of the Avengers?