Big, fancy executive sedans are a dying breed, especially when it comes to EVs. With the Tesla Model S and Mercedes' EQ line on their way out, pickings are slim. Aside from the upcoming S-Class , there's the Lucid Air , Cadillac Celestiq and maybe the Porsche Taycan , depending on how far you're willing to stretch the definition. But as the market leader in luxury sedans, BMW isn't giving up yet. With the arrival of the new 7-series, the company has made a car — with a complete range of gas, hybrid and fully electric options — that truly embraces modern gadgetry. Overview Because we're EV enthusiasts here at Engadget, we're primarily going to talk about the new i7, which is the battery-powered version of the new 7 series. Unfortunately, due to building regulations at Grand Central Station in NYC where BMW's reveal was held, the company was only allowed to showcase a gas-powered car, so this story features photos of the 740.…