User blog comment:B214/Chapter 474 ranting/@comment-49.148.53.57-20160222133234/@comment-7418318-20160222154436

That is unlikely in the extreme to have happened. For the R-System to work it needs several things in place.


 * 1) A body of a person with magic power close to Wizard Saint level - which Simon didn't have. His magic had utility, but lacked strength.
 * 2) A not destroyed Lacrima - Jellal said that if Natsu did any more damage the R-System would be too damaged to work... and it got damaged plenty after that.
 * 3) Magic power - all the magic power was directed up at the sky, so there wasn't enough left to revive anyone with.
 * 4) Someone controlling the whole process - Erza was pulled out of the Lacrima and Jellal directed the energy into the sky instead of using it for resurrection.

So while the components for a successfull resurrection where in place for a shot time, we had Simon's dead body in plain sight the entire time. The moment we lost sight of him, the none of the necessary elements for a successfull use of the R-System were in place anymore, which should make this theory impossible.