Only insiders really know what Roland are planning, and those folks are probably subject to an NDA. Roland corporate closed down their European operation around 2014; that's where its arrangers were developed and produced. The E-A7 was ultimately manufactured in China. As its name implies, the "A" means that it has micro-tuning for Asian scales (but it also has a full complement of "Western" voices and styles.) I think arrangers still sell well in Asia and the Middle East so Roland followed their market.
To clarify the above post, an "E-50" mid-tier arranger workstation was released circa 2007. The FP-E50 that I presume Biggles is referring to, and the GO:KEYS 5 are recent releases with clear Roland arranger DNA. But both stop well short of being an E-A7 replacement.
I have a room full of keyboards--top arrangers from every brand--and I've tried them all. Roland has the best "intelligent" chord fingering. I'm convinced that it's the easiest system for playing a wide variety of common chords with the minimum number of keys pressed, and a minimum of hand movement. Roland's system doesn't require you to play notes that aren't part of the chord, and it doesn't penalize you for playing all of the notes if you know how to do so. Casio's comes pretty close, but other major brands require more skill. Fingering is muscle memory that's hard to relearn, so I would personally LOVE to see Roland get back in the arranger game! At the very least, they could add "sync stop" and legacy style support to the GO:KEYS 5, so that when our older Rolands fail, we have a migration path. My $.02.