...eventually. Looks like the voice actress(es?) dropped the news on Twitter that she's in the studio to record for Stevonnie! So, we'll definitely be seeing more of the fusion at some point in the show. Now to speculate what episode it could be! It's probably, definitely not, 'Too Short To Ride'. Couldn't be the episode that fans have long speculated would include Stevonnie, no way. Probably not it.
Twitter: Emerald