By Tobias Carroll “SIGN UP TO THE FUTURE,” reads a call to action for visitors to DeLorean’s website. While grammatically iffy, it does concisely evoke the DeLorean’s biggest piece of cultural cachet: the prominent use of a DMC-12 in the Back to the Future trilogy. That said, details in the company’s Super Bowl ad and on the website itself are relatively minimal: they’ve been hinting at a revamped (and all-electric) version of the DMC-12 for a while now, and this latest push seems of a piece with what’s come before. The announcement itself has gotten plenty of coverage, and it isn’t hard to se…