Its already been revealed that it will well be getting new printings of The One Ring, Sauron, the Dark Lord, and Tom Bombadil in the Commander set
Pacifism and effects like it are really obvious ones in a Limited environment, but cards similar to Dead Weight and the various Impetus effects in Commander also come to mind
Obviously, there are many, many more we probably haven't pulled yet that are just as cute if not cuter
All this points out to one thing: making Evolving Adaptive grow quickly will be no trouble, especially with the re-introduction of the Proliferate mechanic
Proxies make high-cost formats like Commander and Legacy more accessible to players with lower budgets
Summary Stunt Double is a better version of Clone with flash, allowing for reactive copying of creatures and versatile gameplay options