Stan Lee (R.I.P.) decides that YOU are the PERFECT person to lead Marvel Studios...
Using his Heavenly Powers, He manipulates reality so that you replace Kevin Feige effective immediately.
Also, all the actors, directors, writers, producers, composers, basically ANYONE and EVERYONE who is ALIVE and has worked in the movie/television industry are under a deep hypnosis and listen to your each and every whim & command. So, no worrying about who has what character's rights...
Your goal is to streamline and bring ALL Marvel Media (Only Movies, Television and the like) into one unified timeline. Remove all possible loopholes, plot holes, logical fallacies, forgotten media, anything and everything... All into one MASTER TIMELINE...
You can do re-releases by adding/editing scenes, and your new release will be considered the canon... However, you cannot delete any Media, or alter it so that it is COMPLETELY different...
You cannot, however, alter ANY OTHER FORM OF MEDIA whatsoever. So, comics, merchandise, toys, etc. These are all out of your direct control, but you can SURELY have indirect effects on all of these...