The first Horus Heresy releases are set to arrive on Saturday, and things look particularly interesting for TOW, providing they follow the same model, which they should given most people laud it as the 'Horus Heresy of AoS'.
First, the Starter Box is a big one, which means it'll be expensive (GW say it'll be less than £200, but I wouldn't put it past them to price it at £199

), but I would have thought at some point they'll release the rulebook (which is actually called a Rulebook for once, not the dumb 'Core Book' term some Marketing nitwit coined up for 2nd Edition AoS) separately:
In any case, the fact that they are going all-out on plastic vehicles and weapon upgrade kits as well as Marines gives me hope for TOW:
If they did the similar for its Fantasy counterpart by releasing most units and monsters in plastic and making just the really big stuff in FW resin (as they're doing with the Primarchs in the Horus Heresy), that'd be the best possible scenario.
To get everyone started they're releasing two Army List books for Imperium and Chaos in the mould of the 6th Edition Fantasy Ravening Hordes book, and I could easily see this being applied to Order and Destruction upon TOW's release (if Tomb Kings are finally given the chance to join the forces of Order and Ogres are moved into Destruction):
Also, blast templates, scatter dice and even the red plastic range rulers are back! The last time they appeared I believe was in the Shadow War: Armageddon boxed game during the tail-end of 7th Edition 40K, and seeing them return surely heralds a Return of the Golden Age?