Vulcan's second launch was a success this morning and could clear the way for two more National Security launches before the end of the year.
Nice turn around for ULA with the Vulcan program! Gives the US another Heavy Lift launch vehicle in addition to the Falcon Heavy. Also a boost for Blue Origin and the BE-4 engine program. It won't be long before the first launch of New Glenn adding yet another Heavy Lift rocket to the market.
So within the next couple of years you will likely see Falcon Heavy, Vulcan and New Glenn operating in the Heavy Lift launch environment. Outside of that you will have SLS and Starship operating in the Super-Heavy Lift market, though SLS is only really there for NASA purposes.