The B-Team are not Crimson Raiders, they are Mercenaries, so their adventures in the same universe don’t necessarily need to tie directly into the Main Franchise’s Siren-Centric and Vault-Centric plots. That leaves a whole universe for them to get into the thick of things, so this could be set before or after BL3 since they formed after Fight For Sanctuary and we don’t know anything about what they did from that time period and when they were hired in Borderlands 3 for that certain mission, along with the few little stories we get related to what Tina and Mordecai did in their personal lives.
If it’s a new game with the BL3 engine in its current state, with new characters, actions skills, and weapons, with fun level design and balance, if it’s priced appropriately I’m down for that experience.
As it stands the Ava maps play like Headhunter Packs with the singular maps for the quests. I say that to point out that they aren’t the best examples for what future level design might be like, and FusterCluck’s level design might be a better point of reference for Wonderlands. It’s the spiritual third act in the “In Your Head” trilogy of Dragon Keep, Claptastic Voyage, and FusterCluck.
Now, by my logic, if it was meant to fit between Fight For Sanctuary and BL3, focusing it on Krieg’s time with the B-Team and highlighting the bond he formed with Tina would line up with what they are planning to do with those two in the movie as well.
How do you make that work with a “In Your Head” gameplay concept? Well instead of having Tina tell a story as narrator, the plot device could be that Tannis worked with Tina in some of her experiments, just as she did with Krieg and Lilith. She mentioned she had stored minds on memory cards many times before and had a drawer full. She also mentioned she had been studying the minds of psychos, herself having gone a little psychotic from the trauma we hear about in BL1 & 2. Besides her, I think it’s fair to say Tiny Tina is another friendly borderline-psycho we encounter in the franchise. Tannis would probably be more inclined to study Tina as a first subject because she’s wild enough to learn Krieg’s psycho language, but civilized enough to run a D & D Campaign, well B & B.