we have F-25 Beta Release Candidate  since the weekend, but a bug 
blocks the interactive (VNC) installation, a kickstart-ed installation
might work. If you want to try the installation before the fix gets
into the nightly composes (and the final release), you can append the
following line into your parameters file. It patches the installer
before starting it.
All bugs considered as blockers for the F-25 release are being
collected under https://bugzilla.redhat.com/show_bug.cgi?id=F25s390x