Justice League / Power Rangers Crossover

I've just seen the news that there is to be a JLA and Power Rangers
crossover. In the past DC has accomplished crossovers with He-Man, Marvel
Comics, Thundercats and many other franchises, so I suppose bringing in Power
Rangers is not that big a stretch.

But I do have a problem with such crossovers and that problem is Superman.
You see Superman is depending on the writer, powerful enough to shift planets on
his own and the rest of the JLA are often portrayed as his peers, each with a
level of power that grows and diminishes according to how powerful Superman
appears. So against the likes of Machine Empires or space pirates it would raise
the question of why do we need the Power Rangers?

Of course the good thing about Power Rangers is that there are different
types of villains. There are the machines, and pirates and aliens, but there are
also the magic users. And there perhaps lies the type of villain that would
cause Superman to ask for help. After all he is known to have a slight…
weakness when it comes to hocus pocus. Now the JLA does have its own magic
users, but I'm not sure many of them could be described as warriors, which when
facing an invading army is probably a useful thing to be.

And then I can't help but wonder how they will meet. If they were meeting
with Turbo or RPM I could have seen the Flash blundering his way into a
crossover by vibrating a bit too much around the barriers between dimensions.
And then of course there are always the possibilities of external influences
drawing the two worlds together for ulterior motives. It should be noted at this
point that I'm assuming the JLA will find their way to the Power Rangers' world
when it is perfectly possible that this is all the results of an evil spell or
one of Billy's inventions gone awry.