Source: CrossFit Inc
“In general, gear is allowed that improves safety and/or comfort, but does not confer an advantage.
Athletes may wrap tape around the pull-up bar OR wear hand protection (gymnastics-style grips, gloves, etc.), but they may not tape the bar AND wear hand protection.
Remember to review movement standards and workout descriptions carefully before attempting Open workouts.”
Due to the release of this information, it is now fairly safe to assume that pull ups, toes to bar or bar muscle ups will be featured in the 2018 CrossFit Open.
If you still feel a bit anxious about the Open, this article will help:
Additionally, we put together a collection of exercises that have commonly been seen each year in at least one of the WODs. so that can help as well: