I prefer using agents made or recruited by myself. I'm quite picky about characters, I do not want to risk rejecting your ideas. Sorry.

Thank you anyways, I appreciated the offer!

The wand gets fused with a thing she finds in a locker (just afret she finds her old things) and becomes the Keyblade, and after that the cards are never mentioned again. In the sequel, when Arius asks Sakura to better gear up, she says that she never used a gun (right) and however she has the Keyblade, but doesn't mention the cards. I think it's implied that she cannot open the book again, since the "storage form" of the wand, no longer avaible, is also the key that opens the Book of Clow.

It's implied that is post anime/manga end (There is no way to estabilish waht canon follows), I think. Sakura got attacked by the Insatiate, somehow survived and was transferred to Ever After. She spent years here to regain her memories, but her body didn't age. (Another charge)

However, the main problem with the MJOLNIR suit is the device that increases reflexes and strenght. It's both necessary to use effectively the suit, and unsuitable for normal humans. According to the Halopedia, it would cause broken bones or even death. Sakura's magic maybe helps, but that is not the case for Samantha Carter. So, we have another charge: Handwaving that, or making the Matorans (Bionicle) build better suits than the UNSC... WITHOUT HAVING EVEN ONLY SEEN THOSE THINGS BEFORE. IMHO, it doesn't make sense.

Also, did I say that one of the two baddies introduced is LORD FREAKING VOLDEMORT?