Too many comics people don't understand business. At all. If DC is selling comics and is profitable doing so, then there's ZERO reason to shut it down.
Every company literally needs every dollar and cent it can get, so if any part of it is making money then they will leave it intact. The only way DC gets shuttered off or something is if the company isn't making money and my understanding is that both Marvel and DC have tailored their operations to break even at least, so I don't anticipate DC going anywhere. Except there's other stuff we don't know...