Would the current comic fanbase keep reading comics: Yes.
Would the general public read indy comics: No. The general public doesn't even read comics now. The paper sales each month for the top 5 comics are like 100-150k on average. The US has a population of over 300 million. That's nothing :(.
For comparison think about a CBM for example. Man of Steel made like 660 million dollars. At 10 bucks a ticket (assuming every ticket sold = 1 new viewer, which isn't the case) that mean 66,000,000 people saw the movie. Which way more people than people who read comics. That's why CBM's don't care about only catering to the comic fans, because we're such a small minority.
Me Personally: Probably. Although I would deary miss some of my favorite characters from the big 2.