Probably neither hopes nor dreams. Rotax is a division of Bombardier RECREATIONAL Products, headquartered in Canada and successfully split off in 2003 from the more 'serious' parts of Bombardier that make jet aircraft and mass transit products. Since the 1960s they've operated primarily as the engine supplier for 10 million snowmobiles, three wheelers, off-road four wheelers and watercraft built by BRP in Canada as well as motorcycles, go-karts and recreational aircraft built by others. There's no strong indication of them having the risk appetite to become a supplier for larger aircraft engines to the utility or family transportation GA market. I understand the V6 was contentious within BRP for that reason, viewed as an expensive distraction over a ten year development process and killed off by BRP in 2006 (post-spin-off) after the engine ran into technical trouble.
On the other hand Lycoming and Continental were once primarily car engine suppliers so who knows, but I doubt BRP would take the risk or make the investment again now after 20 years of success focus on recreational products. They're making their money building high volume 'Powersports' toys for much less critical customers.