I think that she will continue to wear her favorites, while adding pieces from the current Queen. After all, it's part of the job description to wear the royal heirlooms, as a sign of the continuity within the monarchy. But within that framework, there is a lot of room for personal choices. With such a large collection of priceless jewels, it will be easy to avoid lesser liked pieces.
I really, really hope that the tradition to wear the George IV state diadem to the State Opening of Parliament will continue. And I'd love to see a second tiara being assigned to her during HM's lifetime. As great as the honeycomb tiara is, but some diversity would be great.
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