Apparently, the answer is YES. This appeared on twitter, but was late deleted:
True? False? Well, the folks at EW are reporting they have confirmed his involvement with his reps although there is no “official” on whom Aykroyd will play in the film. Paul Feig’s Ghostbusters reboot stars Melissa McCarthy, Kristen Wiig, Leslie Jones, and Kate McKinnon. Chris Hemsworth, Andy Garcia, Michael K. Williams and apparently Dan Aykroyd will also appear in the film. You can check it out July 22, 2016. Stay tuned, kids…