Er ... your title seems to beg a question regarding 'Wolverines vs Ninjas Workshop' as being for such participants as would desire to learn to do as Wolverine is doing as depicted in your imagery ...



The question being - Are you actually meaning to refer to a 'Workshop about creating an image depicting Wolverine battling Ninjas' ... ? ...



(... which seems to beg another question, that being is the term 'ninja' both singular and plural? ...)