Edmund tells us the-'Rather peculiar though was that their conversation had ended with Rhaenerys Blackfyre, Lord Hightower was adamant in bringing in the ‘Dragon Queen’ to Cephri, suggesting that a marriage between Aeyron and her would help all parties.'
-Lord Hightower wants Rhaenerys here in Cephri, for what reason we don't know. But who else wants Rhaenerys here? Grand Maester Varlyn, potentially in the next books those two might look to work together to bring Rhaenerys to Cephri-both sides want Aeyron to marry Rhaenerys peacefully but maybe it won't end up like that. Who knows?