No you won't need chicken wire.
Install your wonderboard. Mix up some thinset and use a putty knife to skim the mortor into the joints. Then, place some fiberglass mesh tape over the joints and skim those over with some thinset.
To get the maximum bond between stucco and wonderboard I would skim the wonderboard off with a thin coat of thinset. Stucco the wonderboard while the thinset is still wet.
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