Hey Michel,
I think I may understand what you’re looking for here.
To clarify, rather than have the additional information for tickets collected on the event page, you would like to add tickets from different events added to the cart and then fill out the information one time on the checkout page?
If so, currently our plugin doesn’t support this directly, however you could streamline that process a little by utilizing a plugin such as https://www.woothemes.com/products/woocommerce-checkout-field-editor/
Let me know if this helps.
Thanks!