Can you decide to not publish your research at the present stage as the first author?
All authors must agree to publication; any co-author may delay publication, or withdraw, if they aren't satisfied by the results. (Intellectual property law prohibits publication without consent of all authors, in many jurisdictions.)
Author ordering should be agreed early to avoid disputes. Renegotiation is possible, especially when circumstances change.
No author may strip another of authorship. Any author may push for renegotiation of author ordering. Although an author delaying publication isn't reasonable grounds for reordering, it may be reasonable for reordering if delay is being introduced so that author duties change, e.g., when an author is going to do more work than initially considered.