I am not going to lie, the A-6 would be a "one hit wonder" in DCS. People will love it for about a month before realizing how vulnerable it is. We aren't talking about real life combat with squadrons of aircraft supporting each other. The Intruder is a hell of a bomb truck. That said, I don't see its relevance in game besides being carrier borne. People will complain about being shot down and it will become that module in the corner. Fun to fly a premade mission, but with minimal use in multiplayer without a server full of CAP and BARCAP.
I think the F-111 is a better choice for the game. It allows for people to "go it solo." They can play missions, they can just fly it low level at night while dumping and lighting the burners, they can go into servers and do solo strikes on airfields. I just think it is a million times more practical for DCS than the Intruder. And besides, all of the things Lurker pointed out about carrying over F-14 development to ease costs and time constraints should be a factor. You gain a new aircraft with a completely unique role, but you already have figured out things such as wing sweep, the engines, etc.
Also, the Tornado is cool. I like it and would love to see it some day. Maybe the European devs doing the Eurofighter would be a good choice for it in the future. But the F-111 is unique, just as proven, and could be perfect to fit what I view is a hole in the DCS world. Plus I like bombs in bomb bays and all that gas to burn.
