I'm expecting that Kureha Matsuzawa's going to be seen quite a bit over these next few episodes since he's been writing a lot of the massively plot heavy episodes. Some of his most notable ones includes episodes 7 (Rayquaza and Gibeon's debut), 44 and 45 (the Explorers battle which was the climax for the Terapagos arc), 54 (the Exceed company debut as well as our first sight of the Laquium), 64 and 65 (Amethio getting fired from the Explorers), 74 and 75 (Lucius backstory) and last week's episode with the Rayquaza battle.
Could see Dai Sato also doing some episodes as well.