You didn't say what game you wanted to remake — or, I missed it.
That said .. it doesn't matter. When Roberta and I sold the company we gave up all of our rights. We were well paid, so I'm not complaining.
I have no idea who owns the rights to our games these days.
I would definitely encourage you to make a game. There is a huge market. It can be hard to break into the business, and there's a good chance whatever game you do won't sell .. but, you'll learn with each game you produce and there's nothing wrong with adding to your base of experience.