Before saving Guest Entries, redirect to an entry review page? With guest entries, am I able to redirect before actually saving the entry to say a review page for the user to see the entry?

I figure I could use the guestEntries.beforeSave hook, but not sure how I'd show the information on the page... or pass to a template.

Any suggestions?
You can listen for the beforeSave event, but by redirecting or rendering another template, you're essentially hijacking the request and cancelling the initial save.

You could fork the plugin and add some custom logic using a flag you can tell whether it's an initial save and to redirect, or it's a subsequent save and to continue processing as normal.