Effect on ACW if Jackson survives the wound?

As we all know General Jackson was shot by mistake by his own troops after giving general Hooker a crushing blow at the flank and then died from complications due to pneumonia. But what if Stonewall had not contracted pneumonia and recovered? He would be absent from Gettysburg since he was recovering so no chance there, but he will be back in time for the 1864 season in the wilderness.
 
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