Well since no one has done this yet on NMA I think I will predict how the story will be in Point Lookout 2: Cthulhu Boogaloo.
The player will first start the dlc alongside Valentine looking for some useless women's daughter. This plot point will be very minor and will serve little purpose in the main story if at all. Just like in Point Lookout.
The player will then find themselves in the middle of a faction war between three unlikable factions who's logic, reasonings and morals will shatter your disbelief if Bethesda hasn't done that already.
The three factions quests will be radiant, Kill, Loot, Return
(TM) quest that revolve around you gaining the chosen factions trust and helping them with stupid and illogical bullshit.
Then you will come across the plot twist and at that point Valentine(who was probably acting weird throughout the dlc) will get possessed by Kellogg Cornflakes who will then evolve Valentine into Frosted Valentine(who kinda reminds me of Mecha Hitler from Wolfenstein).
Stuff happens, terrible dialogue and one liners, a lot of shooting and the player will then save Valentine because Bethesda will not give you the option to kill him, although they might just to show up and prove NMA and the Codex wrong.
After saving the day and rescuing the useless women stupid daughter the player will go back home to the Commonwealth where they will be remind that, yes, the dlc did nothing to salvage the game. It will be like Mass Effect 3 and its dlc's all over again. Everything still sucks!
The end!