In the mentioned upcoming new event coming and the new tokens that will be used to obtain things, are these tokens going to be per evenet specific or will they roll over to future events?

If a mech or weapon (double Q: will this be the same offered to everyone) that will be available on the track to win, has already been obtained will it be replaced with something else like the fortune vault, once the skins are gone they become a coins on the progress track?