At the moment, I am moving from olddomain.com (niche site) to the newdomain.com (multi-niche site).

Due to some reasons, I do not want to use 301 right now and planning to use the canonical pointing to the new domain instead.

Would Google rank the new site instead of the old site? From what I have learnt, the canonical tag lets Google know that which is the main source of the contents.

Thank you very much!