Has there been hints of future plans for the Team Fortress franchise? Is a sequel a possibility? Maybe a makeover? New characters? A TF:GO kinda thing?
There isn't going to be a sequel to TF2 anytime soon. Valve is working on competitive matchmaking for TF2, which should be out of beta in the big summer update we'll likely get later this month or early next month.
B4nny, who is the best know competitive TF2 player recently visited Valve to look at the new update we'll be getting soon. Besides saying that competitive matchmaking is coming in that update he said the following:
"Can't share everything, but expect tons of rebalances and an update that is much bigger than just the competitive mode release."
"Step by step TF2 will start looking more like the modern competitive title we all know it deserves to be"
"The casual and community aspects of TF2 are also heavily emphasized in the next big update. Everyone wins!"
Also a little bit of more information from his visit to Valve:
The main reason B4nny was invited to Valve was to look at weapon rebalances. (this is pretty big because as far as we know they've never had a competitive player visit them to look at weapon rebalances, much less balance weapons around competitive TF2)
The current TF2 team has 10+ active members.
TF2 may get majors (CSGO Valve sponsored tournaments with $250k+ prize pools) if matchmaking is well received but but the comp community shouldn't expect direct financial support from Valve anytime soon.
Valve is actively looking at the performance of TF2 so optimization seems to be a big priority for the TF2 team.
The update will be a new take on things - competitive is the main driving force behind the update but it will be beneficial to all aspects of TF2.
Valve really kicked their support of TF2 into high gear with the Gun Mettle update last July and it seems like this upcoming update is going to be more of the same. Typically the big summer update ships shortly before or a week or two after the Steam summer sale so we should be getting it soon. Based on his comments it seems like Valve really wants to make TF2 a competitive game that can seriously compete with Overwatch.