The trouble with Batman is that he comes from a universe with very different rules, one where completely unaugmented, unawakened people can become skilled to the point that they can do things that multi-initiate adepts and cyberzombies can't do. In Shadowrun, mundane characters are simply third-rate in everything. So to make Batman in Shadowrun, he needs to be an augmented adept with lots of high-availability gear to emulate the character from the comics.
The other problem with Batman is that he is a paragon, someone who is at the pinnacle of human achievement physically and mentally, with mastery of many skills. He is a generalist with the skill level of a hyper-specialist. In game terms, in a game where seasoned professional criminals (shadowrunners) have to make sacrifices to even be soft-maxed in their most important Attributes, and can only start out with one skill of 6, Batman would work out to an incredibly high number of build points or karma points if you costed him out.
I think you are better off, instead of trying to recreate the Batman (okay, so you have a ludicrously powerful person who overshadows all of the PCs and doesn't quite fit in this universe - now what?), you should create a Batman-inspired PC or NPC based on an aspect or two of Batman that appeals to you. A cunning detective. A masked, augmented vigilante. A sneaky guy with lots of gadgets. And go from there.
