I wouldn't be too sure. On the surface it seems like an impossible idea, but the devil's in the details. If anything the least likely party for Adidas to do that for - of all involved is Juventus.
They have a huge deal with both Pogba and United. Both are working against each other atm. It's a mess. United need money to rebuild, pass FFP and save PR face. Pogba needs a bid that wouldn't scream 'failure' (mentioned figures for RM kind of say that), he needs a team to be a PR star for and a 'certain' fit in terms of results/performances for Paul.
Adidas could help everyone and mostly themselves by helping to accommodate this deal. Assuming they believe everything works out in a similar direction they might save quite a penny in the long run.