Questions about The Darkins

Some background: Aatrox's lore always mentioned something about there being five darkins running around Runeterra (too lazy to check so y'all can go look up the specifics). I don't think anyone really took it seriously until Kayn, and then Varus, were released/re-lore'd, making three of the five. I personally love the darkins (especially scythe-boi - he replaced Spooky boi Nocturne as my go-to jng), but have some questions that I would love to get answered, by either a red or a guy who has spent more time on the internet than me and already knows the answer. Questions: 1: Will there be more?
->I would assume so, since there isn't really a reason not too. Sure, Riot probably has other things on their plate, but I'm sure the other two are rattling around in there somewhere. My real question is really split into two parts - gameplay and character. In terms of gameplay, we already have a darkin for the top/adc/jng; are we gonna get a mid/supp, or nah? Personally I would love to see a supp darkin - mixing the blood theme with the supporty thing. In terms of character, (I'm going to be totally honest here) will they be female? Obviously for diversity's sake... Of course. Also, will they maintain the violent themes of the other three? Because I would honestly love to see Thresh get a fellow spooky supp.

2: Will they boost eachother? ->I'm not exactly sure how the released three are related, but I would assume that if there are only five, they would be interacting with eachother a fair amount. Hell, there might even be some pairing off if the other two are female (except for Varus, of course, for... gay reasons). I was thinking some xayah/rakan stuff would be cool. IDK how that would balance out, though. having five dudes/dudets feed off eachother would be rather OP, but maybe it would be ok since a full darkin team might be easy to counterpick, and would be a bitch to get in ranked (if you see a bunch of darkins on the other team get the last-pick to grab one.)

3: Will they have group skins? ->Personally I love the themed skins, but a lot of them (apart form star guardian, which seems really well put together) just seem like Riot going through and grabbing champ names out of a hat for each group of skins. I think a group of, like, BloodBoiled skins might be really appropriate to be an exclusively Darkin skin. Or, like, a skin from their early days. When three of them were imprisoned and the other two were chilling in FogOfWar.

Premature TY to any answers. Darkin Enthusiast signing off