I could see the single coming this Friday, tons of promo happening within 3 weeks after (a boy can dream). Because let's be real Britney isn't going to have longevity when it comes for hits. Her first few weeks are what counts. So an album 3 weeks after the single seems realistic to me. Perched but I don't have my hopes up.
If it's in four weeks like four Friday's, then maybe the 6th of May is when the album will come. Beyoncé should be releasing before her tour starts (hopefully) so that would be before the 27th, so I don't think they'll clash.