The Reality Strikers were put together to face several threats that face the Trinity of realities that compromised the 'prime' reality. The Prime Reality itself, the Alternate Reality that branched off it from a single action, and the Classic Reality based off TAW 1 - 3 and created by Wind for his help in saving the Prime Reality. Sensing a reality tear somewhere in the Prime Reality that was growing, and growing threats that seemed to be hitting all three realities at once, Cheryl formed An Alliance of Realities to combat the threat and fight them - it failed to work to begin with, so she forged the Reality Strikers to be compromised of people from all three teams and a base of operations that were linked to all three realities so they could perform missions in the Trinity and the Multiverse, to learn what these threats were, and what the tear itself is about.
Welcome to The Reality Strikers.