Target Bundle with hook_element_info_alter
Bundles are defined in hook_entity_info(), so the complementary alter hook is hook_entity_info_alter()

Alter the entity info.
Modules may implement this hook to alter the information that defines an entity. All properties that are available in hook_entity_info() can be altered here.

hook_element_info_alter() is for altering form elements (which a bundle is not), so it can't be used in that context.