According to the interview Eto had decided to retire last year, before changing his mind and has now focussed on improving as he attempts to work towards getting another world title fight. Whilst a win over Escobia won't get him that title fight, it will allow him to shake off some ring rust, given that he has been out of the ring since last November, when he lost to Carlos Cuadras in a WBC Super Flyweight title bout.
The bout with Cuadras saw a lot of holes being shown in Eto's boxing, most notably his jab and it seems that he has been working hard on improving that particular punch, something he'll be hoping to prove in his bout with Escobia. If he can improve his jab, his control of fights and improve the overall skills, adding to his excellent heart, stamina and work rate, then their is belief he can become a world champion.
(Image courtesy of the Okinawa Times)