There are some changes already on the GW webstore that include Ultramarines getting their own tab separate from Space Marines, and over on the last chance to buy.... The Gathering Storm books are looking like they are going away, although a couple do say "email me" which suggests that you may still have a chance to get these books if you don't yet have them.
I almost wonder if it's possible we might see a compilation book release, perhaps with updated rules.
Last Chance to Buy
You will also notice that templates are on the list..... figured as much; as well as Dark Vengeance.
The Ultramarines new position on the webstore.