It's easy to copy one objective for multiple people, or copy an existing objective to replicate it for the next time period. Go to any objective you own and click the three dots icon (kebab menu) , either at the right side of the goal row or at the top right of the detail popup, and select Copy Objective.
You can alter the new objective's key results and set a new time period for the objective. Note that if the key result was sourced from a workstream, or from other key results, this link will need to be reset. This way your key results will not accidentally be pointing to old workstreams or key results.
All alignments and dependencies will be reset as well, so you'll have a fresh network of objectives for each quarter to connect to each other!