Just throwing back to the talk about Battleforce boxes and Regiments :
GW’s ‘modular’ rules sales pitch for AOS 4th and the new Spearhead boxes push me towards the idea that GW is trying to put its ‘discount boxes’ as a central building component towards a list. Using a launch Battleforce/Box as a playable ‘~1000pt core regiment’ for your general, with the idea that a player could buy two ~500pt ‘Spearheads’ to build up two additional regiments really helps an onboarding into the ‘true-scale’ 2000pts whilst also making it easier for a newer player (‘buy these three boxes for an instant army!’). I’d place a good bet on a sales pitch for the new starters mirroring 40k’s ‘Combat Patrol in a Box!’ - just relies if the launch box pushes a ‘1000pts in a box with terrain!’ line as expected.
I’d imagine it’s more certain if the new Spearheads, like the ones we have seen, are more cohesive in their themes e.g GSG no longer has squigs, troggs and gobbos but is more ‘here is a Squig hero with Squigs galore!’