AN IDEA FOR MISSION SYSTEM

I was thinking that Riot should create mission that allow for player to receive icon/content from previous events. For example, they could create a series of mission that are equal to or harder than the ones that existed during the Bilgewater Burning Tides event to get the TF/Graves/GP icons. Really want that GP icon from the end of act 3. Obviously to make it fair to those who already got the icons, the new missions should be of greater difficulty. Let me know you thoughts on this idea!