[X] It's hard to break old habits so you might as well stick to what you know and that's being a morally ambiguous mystery guy with powers. Now you just have to find a place to crash and set up shop. Let's see how Brockton Bay reacts to the presence of the Amazing and Mysterious Mage known as Ebon!
[X] Gangs, villains, monsters. This world is full of dark forces. Why not join them? There's plenty of fun to be had with robbing banks and beating down super-powered thugs in spandex. Who knows, eventually you could conquer this pitiful, grimdark world. You'd love to see Original Jacob's face then.
[X] You've regained some of the Original's power and you're just itching to use them. Go find some criminal scum and engage in gratuitous amounts of violence. Maybe destroy a gang or two while you're at it. Honestly, you really need to let out some steam. Getting thrown into another reality was not on your fucking to do list!
[X] Hmm... Short term, you'd want to set up shop as a 'mysterious sales person', for you need details on the precise players of this world, how to magic up the setting, how to 'save' and convert despairate talents to the Black Kingdom... And how to eventually conquer this Superhero obsessed universe, get back to your home world in time, and maybe even complete a different long term project to revive the Black King before Original Jacob finds out about it.
-[X] And maybe then, you'd go beyond 'expendable body double', and more 'extra Ebon Double'. Or build a resumé to ensure divergence wise, it'd be in his best interests to treat you as a sort of 'dark bro'. Yeah... And, if you can even complete the more dangerous long term projects in this world, without the Light forces ever knowing? All the better...