I think that whatever assets they put in game depend on the budget they have or the sponsoring company is willing to pay to get its stuff in the game. Personally I don't like much things like logo T-shirts and baseball caps and don't care much for the brand thing, but I am happy for any new useful and nicely made content. Would be nice to have something to expand on the shopping or cafe and restaurant experience. Like if they do another collaboration with MAC, maybe they could add in a make-up counter where sims could test and buy make-up items. Or if they do a collaboration with a coffee brand maybe we could get some new coffee recipes, and some coffee posters and decor to put up in our cafes.
