I think the current official answer is no. But Blizzard also said that when players asked for WoW Classic servers. “You think you do but you don’t.” Remember that guy? We all know the outcome to that.
The only downside that I see is if a console and/or a mobile phone version of WoW became so popular they might stop developing WoW for the PC. That sounds unlikely. But think about it. If they got 20 to 30 million people playing a mobile phone version of WoW why bother with a 2 million player version for the PC.