They think but saying they will leave OGL 1.0a alone, and releasing SRD 5.1 in the Creative Commons license that they have pulled the wool over our eyes. Fat chance Wizards!
We know that you still intend to pull OGL 1.0a at some later date and they also think that they never have to mention SRD 3.0 and 3.5. They still want to destroy all old school TSR era D&D related games and even the 3E and 3.5E games.
So we need to keep fighting and not let that happen. If you want a retro "clone" (emulation is a better word) of OD&D or other version (Holmes, B/X, BECMI, AD&D etc) then you need to port it over to the new Creative Commons license or put in under the new ORC license once it is out. Better yet if you have deep enough pockets, just write your OD&D ( or etc) emulation without any license and build it from the whole cloth, which can be done if you have the skill and the time to do it.
But here is where Wizbro is really stupid! Now obviously I don't condone this; however, if they pull the OGL 1.0 and 1.0a and if they go after people using SRD 3.0 and 3.5, then they have eliminated any reason for some people to refrain from piracy. IMO if they between now and the future come back and try to kill all the old school "clones," then it is my guess (again not saying I condone this) that they will usher in a Golden Age of Piracy and they themselves will be the driving force for making that happen.