Neither Fela! nor Hair sold well. Generally, if a show has closed it's because the market didn't exist any longer on Broadway. Even if the summer is relatively light (which I'm not sure is a fair characterization), tourists will stick to their staples like Wicked, The Lion King, Phantom, The Book of Mormon, Jersey Boys, etc. and if interested in something new will probably go for Matilda. I just don't see how a summer engagement will make financial sense.
Scratch and claw for every day you're worth!
Make them drag you screaming from life, keep dreaming
You'll live forever here on earth.