Although the Triumvirate is the only new miniature release, there's a few ways to get in if you want a large force - there's the Reborn Warhost Detachment which comes with a Jes Goodwin print (oh so tempted), the Aeldari Bladehost, the Whispering Ghost Hall, or the Soulbound Vanguard which leaked a few weeks ago. Jetbikes are a big part of the Eldar, and awesome miniatures, so there's a few different flavours: Ynnead's Net, Black Guardian Windriders, or the Black Guardian Vyper Squadron. There's some infantry too with the Black Guardians, and a more beefed up version with the Storm Guardians which is the former set with a upgrade set to make them close combat. I guess the Dark Eldar sets are next week?
Anyone who orders over $85 worth if stuff will get one of the art cards, a different one each week (above) ... which tells you that this release cycle is going to be around 3 weeks.
Outside this release there is a new Horus Heresy novel based around Garro