Assuming it is end grain, you wouldn’t want to send it through the planer - it will tear up the wood.
What I would probably do is resaw it on the Laguna to get it close and then send it through the belt sander [when it is finally repaired]. Just remember to take just a little bit off at a time on the drum sander [good write up here: PLEASE READ! Drum sander operation/information]. We do have a hand-held belt sander that you can use instead of the drum sander, just need to make sure your careful to sand it evenly.
The other easy way to do it would be to use the CNC to surface it down to 3/4". The last way would be to use a router sled [not sure if we have a jig, but is fairly easy to make].