Hello,
I've searched but have not found this feature, or a request for it. But, apparently it used to be possible-ish, so maybe it was removed for a good reason. ( Looking at http://hdr-photographer.com/2012/11/tutorial-how-to-use-magic-lantern-for-taking-bracketed-photos/ it looks like 0ev was an option when this was called HDR Bracketing, back in '12).
What I should very much like to be able to do is have some variations available that use iso, aperture and shutter speed to present a series of similar variations based on the chosen settings. Basically in order to be able to test different f/stops and see what works best for required depth of field and bokeh.
As this is an undeliberately mysterious cryptic explanation, let me explain with an example. I have iso 400, f/8 and 1/125 set. I choose 5 tv variations. This keeps 1/125 as the speed, but makes 5 photos at the same ev but using different iso and f stop settings (ie so it varies f stop at the same ev). It would create, if a variations spacing of 1 f stop was set, 5 shots: iso100:f/4, iso200:f5.6, iso400:f8, iso800:f11, iso1600,f/16. In other words all the same ev value, but f/stop variations. This would benefit me because I don't always choose the right f/stop and I'd like to automate a few more options.
Apologies if this has been covered or rejected for a reason - searching for 0ev bracketing returns nothing and I didn't find anything seeminly relevant.
Perhaps not exactly what you need, but "aperture bracketing" seems quite similar: http://www.magiclantern.fm/forum/index.php?topic=3045