The word interesaré is the future form of interesar in the first person singular.
See the full interesar conjugation

interesar

Señor Hallam, una vez más me interesaré por esta cuestión.
Mr Hallam, once again I find this an interesting point.
Cuando esté disponible ya no te interesaré más.
When I am available, I won't interest you.
Si el asunto del dictamen o del informe interesare a más de una comisión, el Presidente designará la comisión competente para el fondo y, en caso necesario, una o varias comisiones a título complementario.
If the subject of an opinion or report concerns more than one commission, the President shall designate a lead commission and, where necessary, one or more supplementary commissions.
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