The current Canon instant savings promotion is scheduled to end this Sunday at 11:59 PM EST.
Yes, the promotion could be extended. However, it could also end as scheduled (most of Sony's individual camera and lens promotions ended). So, if there is a camera or lens or lens that you want on this list, now is a good time to buy it.
Also, consider checking the Canon USA Store refurbished camera and refurbished lens inventory as the promotion pricing often affects refurbished pricing.