What would happen if Hadrian's wife had not suffered a miscarriage and later had an abortion, or what if Hadrian had married Antoninus Pius's daughter as was discussed after the death of Hadrian's wife Sabina and produced and Heir. How would this alter the Roman Empire would it reset the precedent of a Royal Dynasty because afterall Trajan and Hadrian were related, it most likely be called the Spanish Dynasty (Forgot name for Roman Spain). I for one think it would lead to a short Royal Dynasty because the Roman Empire at the time of the 5 Good Emperor was at it's peak and Trajan and Hadrian had the complete loyalty of the Legions but im looking for your opinion