Speaking of new releases, I always suspected - and still suspect - that the total number of people who collect Eldar in the world is just not big enough to justify investing into re-releasing their existing kits in plastic. It has been told on many occasions that, unlike moulds for resin or metal, designing and building a plastic mould is seriously expensive, and thus such investment will be justified only if you can count on getting some massive sales of the newly released plastic kit. With the existing Aspect Warriors it just might not be the case.
Plenty of niche units in other armies - as well as simply low-selling armies - have had multiple plastic kits in the past. I think GW said years ago that changing production costs had made making new plastic kits much more affordable. Units like Dark Reapers would probably sell as well as jetbikes. Would most Aspects really undersell Wracks, Hellions etc.? The last Dark Eldar revision added at least 6 plastic kits for a range that's unlikely to be as popular as CE (at least at the time they were released) - and that's not counting the three distinct vehicles (never mind the variants) or the single-pose plastic characters. Harlequins got two plastic kits.
The Eldar need at most only 6 and a half plastic kits to fully plasticise the Aspect range.
I doubt they'd do a single 'Aspect Warriors' kit and wouldn't want them to, but they may combine more similarly-posed Aspects into one - such as Warp Spiders/Dark Reapers. Or they might go the route of plastic character models and have static rather than poseable models but simply made from plastic rather than resin.
Of course this all assumes any updates will be in plastic, which needn't be the case. While I'd expect them to gradually plasticise the range, many could simply be updated models in resin.
The only two pairs of Aspects that theoretically could be released as single unified sets are Avengers + Dragons and Banshees + Hawks. The armour of Reapers is way too distinct in design, and so is the armour of Scorpions and Spiders. Scorpions are also traditionally sculpted in very distinct characterful poses, which reflect their combat style and would not fit any other fighters.
Current Reapers, from what I can tell in the photos, have more distinctive armour than the 3rd Ed. versions or the RT ones, but that's confined to this particular set of models and isn't a sacrosanct part of the Reaper 'look'. I think they could quite happily share a kit with Warp Spiders, as the jump generator can simply be an add-on component.
Nice idea for Hawks/Banshees - I'd had it in mind that, mechanically fiddly as they are, plastic Hawks might be the least likely of all. Then again, part of their seeming unpopularity may simply be down to having fiddly models. Scourges can get a plastic kit, so Hawks may have a shot.
Hell, it's not without reason that even Space Marines, despite their unified looks, have different kits for, say, Tactical and Assault marines, as the two units have very different dynamics. They also have separate kits for normal and sniper Scouts, command squads, honour guard, Legion of the damned, etc. Devastators also come as a separate kit, just because the weapon options are so different. And Eldar are not Space Marines, their looks are much less unified.
At least in the past many of those used the same torsos packaged on different sprues - Devastators were the same basic Marine models as Tac Marines.
