Both Wolf and Sphere can show up easily enough. Since Sphere is New Genesis tech, she could have been captured by an agent of Darkseid and let loose during the invasion of Earth to see how she handled. Something happened, she gets badly hurt and knocked offline. And she's been healing this whole time until Conner finds her. With Wolf, he could also be a Cadmus experiment, or an arctic wolf that got mutated by the Fortress of Solitude somehow. I love how in comics, things can be utterly ridiculous but they just work.<br/><br/>Wally's presence probably won't help Megan stop blushing if those thoughts are still on her mind, lol.