Are Jira planning on introducing conditional fields or status'?

[James Deehan]

I would like to add a conditional label or status to a ticket based on the status of the linked "is blocked by" tickets. Is this something Jira has or could develop?

EG

If any of the "is blocked by" tickets are not yet in status "RELEASED", then label this ticket as "BLOCKED"

of

If any of the "is blocked by" tickets are not yet in status "RELEASED", then this ticket must be locked to the "BLOCKED" column

[Mikael Sandberg]

You could use automation to do this, and add a Blocked status to your workflow. The automation could trigger on when you add a linked issue and check what status the issue is in and move it to Blocked if the current status is not Released.