From the Warhammer Community Page:

First off – what if you could squeeze all the thrills of a game of Warhammer 40,000 into your lunch break across a coffee table?

Welcome back, Kill Team!

This new edition gives you everything you love about Warhammer 40,000, in less time and in less space. Using deep rules for squad customisation and specialists, you’ll be able to assemble an elite team from any faction you choose and pit them against your foes in fast-paced tactical skirmishes.

From one-off matched play battles to in-depth narrative campaigns where your fighters grow and evolve, this edition of Kill Team is a fully fledged game in its own right – it doesn’t use the existing Warhammer 40,000 rules set (but it’s just as thrilling!). Whether you’re looking to try out a new faction or explore new tactical challenges with your existing Warhammer 40,000 collection, there will be loads of great gaming opportunities for you.

What’s more, Kill Team will be released alongside a new war zone’s worth of modular battlefield terrain designed by the same team who brought you the Sector Mechanicus kits.
There was also this video...

With Necromunda out now this kinda seems like an odd release, especially as they seem to be pitching it as a 40k intro game but without 8th ed rules. I noticed the use of a D10 die in the video.

There isn't much to go on right now but I am interested to hear more. If it ends up ticking the right boxes for me then I might start collecting some 40k minis again...I hope so as I've reluctantly drifted away the last few years.

I hope it doesn't go the way of Shadow War with odd squad choices and a lack of support.