Players have determined that - apparently - the 4E is in large part the driver of the feeder announcements and who
4E’s follow a rotation with three conditions:
- Latest, Latest, Vintage, repeat
- The next Essential is the Latest/Vintage character that was longest-ago run
- New releases interrupt this schedule but do not replace it. So if we had L, L, then a New release essential (ex: BWIW), the next 4E will still be Vintage.
Quick aside: the Classic 4E pool is so large, and they are run so infrequently, that the current rotation schedule is 16 months between runs and counting.
Today, 5/22/18, we are 2 weeks from the last feeder (Peggy to Cap) but still two weeks from the mostly followed 4 week schedule of feeder changes.
We had an off cycle (2 week) announcement with BP. Note that 4BP feeds 5BP, which is the blindingly obvious choice, although they could have stretched and picked an FF member since BP appeared in FF first.
We do not yet know if BP was the start of a 2 week announcement schedule or a one-off. The past few feeders have been announced on Monday with the change occurring on the following Wednesday at data push, but obviously that could be altered. On a two week schedule, we could see all 5’s fed within a year; otherwise it is somewhere around 2 years.
Anyway, it appears that the next essential in the rotation in large part drives who is the next feeder, based on the schedule of feeder announcements/changes.
And so: while people keep pointing to 4SL not feeding 5SL as an example of nonsensical choices (I thought so too), it was Drax’s turn to be an essential at the time of the feeder change and the most logical - most canon appropriate - choice for him to feed is 5SL.
The question is less “who should feed this 5?” and more, “Who should this 4* feed?”
Lastly, recently the following 4’s were skipped as essentials, even though they were due to be run: Professor X and Ghost Rider. Ghost Rider has an obvious 5 to feed; Professor X probably has the strongest lore connection to either Phoenix or Archangel, either one could be argued successfully, although Teen Jean seems like an obvious Phoenix feeder.
Hopefully the apparent logic behind the decisions might help players understand some past feeders while allowing us to better predict future feeders.