I'm interested in creating workflow based on bulk email opens and click throughs. Is this possible with CiviRules? If no, is support for these events planned?
Yes and no!
Yes, this would certainly be possible within the framework which CiviRules is build on.
No, currently this specific event has not been developed. Conceptually this doesn't seem to be too difficult event to create. You or your developer can try to do it yourself using the new cookbook on CiviRules, or consider funding this work to be done by the first creators of the extension.