Wouldn't bother me either way.
I'm just glad we have a race out there filming, with many of the contestants able to return, and whether they choose to pay mention to the previous filming in the first episode or not, I won't mind. Or if they release the footage as a special as well, either way is fine to me. And this is coming from someone who was there for the entire 2020 first leg in London and was probably filmed helping teams also. I'm just happy most of them are out there racing and get to experience this new race.
I feel more excited than I have for a long time about a new season. The cast is diverse, there are several contestants over 45, there are going to be lots of cool changes in production (the TAR airplane, self-driving, how do they navigate and ask for directions while keeping safe from COVID, less big populated areas for clues). It would be cool if they could do some charter flights to separate teams here and there so that we get the feeling of teams fighting for flights etc. but in a TAR-controlled way. For example, they could have landed in London Stansted and then chartered two flights (5 teams of each) to create some flight drama...just my two cents!