2020 Offer holder - what now?

I did a spring week in London in April and got a return offer for summer 2020 IBD SA at a top BB.
Off course I sent thank you notes to the ~10 people I went to have coffee chats with during the spring week, but now I'm not sure what to do next. I will be back from summer break soon.

Should I be catching up with people from the bank? Since I already have an offer and the start of the internship is quite far away I'm not sure what the purpose of such a meeting would be. Or should I try meeting people from other divisions or even other banks to both get a broader view of the bank and set myself up for FT recruiting in case I don't convert?