The recent blog post clearly informs us that Blizzard will support D3 in the future years. This brings the question of microtransactions again. If they are going to invest more programming resources in D3, they surely have plans how to monetize the game better. I doubt character DLCs will be their main way.
Are we going to see the announcement of cosmetic microtransactions and selling of stash space in D3 at Blizzcon 2019?